Steam-pipe covering



(No Model.)

L. A. PALMER & J. BAIER.

sTEAM PIPE COVERING.

No. 437,041. Patented Sept. 23, 1890.

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UNITED STATES PATENT OFFICE.

LANSING A. PALMAR AND JOHN BAIER, OF KANSAS CITY, MISSOURI.

STEAM-PIPE COVE-RING.

SPECIFICATION forming part of Letters Patent No. 437,041, dated September 23, 1890.

Application filed December 7, 1889. Serial No. 332,966- (No model.)

To aZZ whom it may concern.-

Be it known that we, LANSING A. PALMAR and JOHN BAIER, of Kansas City, Jackson county, Missouri, have invented certain new and useful Improvements in Steam-Pipe Coverings, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

Our invention relates to improvements in steam-pipe covering, and consists in the novel construction hereinafter set forth and described.

In the drawings, which illustrate the manner of carrying out our invention, Figure 1 is a transverse section .of the asbestus-oement covering. Fig. 2 is a side view of the mold around which the cement covering is cast. Fig. 3 is a broken-0E perspective view of our improved pipe-covering,showingthe asloestuscement covering in position on steam-pipe, and Fig. 4 is a cross-section of said covering,

Referring to the drawings by letter, A represents a covering for steam-pipes, composed of asbestus, asbestus cement, or any plaster or pulp materials, this being cast around mold C in such a manner as to have channels or grooves a, which constitute a spiral chamber through which the air circulates, thus making a continuous passage for the air around the pipe.

a are the shoulders which rest on the pipe D. These may be made much smaller than the channels or grooves a, thus making the space covered bythe surface of cement coverin g much smaller than the air-space.

B is an outer covering for the cement pipeprotector, made of canvas or other suitable mapieces, and can therefore easily be placed to all kinds of pipes, as D, and then wrapped with canvas or other suitable material B.

Having thus fully described our invention, what We claim as being new, and desire to secure by Letters Patent, is

1. A steam-pipe covering composed of the inner covering A, having the inwardly-proj ectin g spirally-arranged shoulders 01,, forming the spiral air-chamber a, and the outer covering B, all arranged substantially as shown and described.

2. A steam-pipe covering consisting of the inner coverin g- A, formed in two sections, each section being constructed with the shoulders at and grooves a, so formed that when the sections are arranged upon the pipe the shoulders and grooves will register and form a spiral air-chamber surrounding said pipe,

and the outer covering adapted to secure the inner section upon the pipe, substantially as shown and described.

In testimony whereof we affix our signatures in presence of two witnesses.

LANSING A. PALMAB. JOHN BAIER. Witnesses:

J. E. HIGDON, R. A. BALDERsoN. 

